Improvement in the manufacture of glassware



T. B. A-TTERBURY. MANUFACTURE o-F G-LASSW'ARE. No.17z,946. I PatentedFeb. 1, 1876.

.- wllq sslas. hvliqlm- ".FETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D. C

f rrnn STATES PATEN OFFIoE.

THOMAS B. ATTERBURY, on ,PITTSBURG, PENNSYLVANIA, ASSIGNOR TO T. B. ANDJ. s. ATTERBURY. l

IMPROVEMENT IN'THE MANUFACTURE OF GLAS'SWARE- Specification forming partof Letters Patent N 0. 172,946, dated February 1, 1876; applicationfiled January 10, 1876.

different colors. Fig. 2 is a shell of glass of a single color. Fig. 3represents a pipe, with the gathering, Fig. 4, a section of the pipe,gathering, and shell; Fig. 5, an ordinary mold. v

Like letters refer to like parts wherever they.

- occur.

My invention relates to the manufacture of hollow glassware, composed oftwo or more different colored glass; and it consists, first, in a hollowarticle of glassware, composed of glass of two or more colors, thesurface of the article at and near the junction of any two colors beinguniform, or nearly so, and the glass on one side of the apparent line ofdemarcation approximating in thickness that upon the opposite side ofthe line; second, in forming hollow articles of parti-colored glass, bycombining a shell of one color with a gathering of another color, andthen completing the article by the usual method of forming blown ware. 1

Heretofore in the manufacture of hollow glassware, composed of two ormore colors, the practice has been to form a portion of the article ofone color, and of the required size forthe finished article, and blow orpress the remainder of the article from glass of a differ:

ent color, uniting the two at the time the final portion is blown orpressed, thus obtaining an article, portions of which were in relief, orto. gather from two or more difi'erent colors, and after having blownand shaped the article tov cutaway the glass insuch a manner as to ex?pose the different colors. Iueither case the surface of the glass willbe irregular, and portions will be in relief.

I first press upor otherwise form a shelha,

of glass of any desired color, giving to the edge of the shell the formor configuration which ,is required at the line of junction. This shellwill be of less diameter than the corresponding part of the finishedarticle, of-

ten in the. proportion of one to three, dependent on the articleto beproduced. I next take the ordinary pipe andgathera portion of glass of adifferent color from that of the shell, and after blowing up thegathering slightly I stick the shell a to the gathering, and then reheator warm the same in the glory hole, obtaining a weld or union of theshell and gathering, after which the article is blown in a moldcorresponding in formto the article to be produced, and finished in theusual manner.

In the drawing, B represents alamp-bowl of two colors, a b,"a/ being theexpanded shell a, and b being the gathering b, withwhich the shell wasunited, as before specified. O and G are the an ordinary mold.

From the very nature of the process specified it is evidentthatthe'different colored glass, being united previous to blowing orforming the article, must expand equally thereafter and give a shell ofuniform, or nearly uniform, thickness and surface, as the gathering andshell is in reality a unit; and it ,is further evident thatthe shell abeing first usual blow-pipe and pressed or independently formed, anyshape may be given to the edge or lip and the form of line of unionbetween the different colored glass. Predetermined care should betakenin the several. steps to center the shell, and especially so whenshaping in the mold or otherwise.

By the process specified globes, chimneys, bowls, bells, and likearticles known to the trade may be formed Without further directions ordetailed description, and footed ware of several colors may he made bypressing the stem and foot of any given color, and forming the bowl oftwo or more colors, as specified.

Having thus described my invention, what I claim, and desire to secureby Letters. Patent, 1s

1. A hollow article of glassware, composed of glass of two or morecolors, the surface of the article at and near the junction of any twocolors being uniform, or nearly so, and the glass on one side of theline of demarcation approximating in thickness that upon the oppositeside, substantially as specified.

2. As an improvement in the manufacture of parti-colore'd hollowglassware, combining a previously formed shell of one color with agathering of another color, and then warming in and completing thearticle in the usual manner of forming blown glassware.

In testimony whereof I, the said THOMAS B. ATTERBURY, have hereunto setmy hand.

THOS. B. ATTEBBURY.

